archive/*: convert to C++

src/archive/ZzipArchivePlugin.cxx

@@ -0,0 +1,262 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/**
+  * zip archive handling (requires zziplib)
+  */
+
+#include "config.h"
+#include "ZzipArchivePlugin.hxx"
+#include "ArchiveInternal.hxx"
+#include "ArchivePlugin.hxx"
+#include "input_internal.h"
+#include "input_plugin.h"
+#include "refcount.h"
+
+#include <zzip/zzip.h>
+#include <glib.h>
+#include <string.h>
+
+struct zzip_archive {
+	struct archive_file base;
+
+	struct refcount ref;
+
+	ZZIP_DIR *dir;
+	GSList	*list;
+	GSList	*iter;
+
+	zzip_archive() {
+		archive_file_init(&base, &zzip_archive_plugin);
+		refcount_init(&ref);
+	}
+
+	void Unref() {
+		if (!refcount_dec(&ref))
+			return;
+
+		if (list) {
+			//free list
+			for (GSList *tmp = list; tmp != NULL; tmp = g_slist_next(tmp))
+				g_free(tmp->data);
+			g_slist_free(list);
+		}
+		//close archive
+		zzip_dir_close (dir);
+
+		delete this;
+	}
+};
+
+extern const struct input_plugin zzip_input_plugin;
+
+static inline GQuark
+zzip_quark(void)
+{
+	return g_quark_from_static_string("zzip");
+}
+
+/* archive open && listing routine */
+
+static struct archive_file *
+zzip_archive_open(const char *pathname, GError **error_r)
+{
+	struct zzip_archive *context = new zzip_archive();
+	ZZIP_DIRENT dirent;
+
+	// open archive
+	context->list = NULL;
+	context->dir = zzip_dir_open(pathname, NULL);
+	if (context->dir  == NULL) {
+		g_set_error(error_r, zzip_quark(), 0,
+			    "Failed to open ZIP file %s", pathname);
+		return NULL;
+	}
+
+	while (zzip_dir_read(context->dir, &dirent)) {
+		//add only files
+		if (dirent.st_size > 0) {
+			context->list = g_slist_prepend(context->list,
+							g_strdup(dirent.d_name));
+		}
+	}
+
+	return &context->base;
+}
+
+static void
+zzip_archive_scan_reset(struct archive_file *file)
+{
+	struct zzip_archive *context = (struct zzip_archive *) file;
+	//reset iterator
+	context->iter = context->list;
+}
+
+static char *
+zzip_archive_scan_next(struct archive_file *file)
+{
+	struct zzip_archive *context = (struct zzip_archive *) file;
+	char *data = NULL;
+	if (context->iter != NULL) {
+		///fetch data and goto next
+		data = (char *)context->iter->data;
+		context->iter = g_slist_next(context->iter);
+	}
+	return data;
+}
+
+static void
+zzip_archive_close(struct archive_file *file)
+{
+	struct zzip_archive *context = (struct zzip_archive *) file;
+
+	context->Unref();
+}
+
+/* single archive handling */
+
+struct zzip_input_stream {
+	struct input_stream base;
+
+	struct zzip_archive *archive;
+
+	ZZIP_FILE *file;
+};
+
+static struct input_stream *
+zzip_archive_open_stream(struct archive_file *file,
+			 const char *pathname,
+			 GMutex *mutex, GCond *cond,
+			 GError **error_r)
+{
+	struct zzip_archive *context = (struct zzip_archive *) file;
+	struct zzip_input_stream *zis;
+	ZZIP_STAT z_stat;
+
+	zis = g_new(struct zzip_input_stream, 1);
+	input_stream_init(&zis->base, &zzip_input_plugin, pathname,
+			  mutex, cond);
+
+	zis->archive = context;
+	zis->file = zzip_file_open(context->dir, pathname, 0);
+	if (zis->file == NULL) {
+		g_free(zis);
+		g_set_error(error_r, zzip_quark(), 0,
+			    "not found in the ZIP file: %s", pathname);
+		return NULL;
+	}
+
+	zis->base.ready = true;
+	//we are seekable (but its not recommendent to do so)
+	zis->base.seekable = true;
+
+	zzip_file_stat(zis->file, &z_stat);
+	zis->base.size = z_stat.st_size;
+
+	refcount_inc(&context->ref);
+
+	return &zis->base;
+}
+
+static void
+zzip_input_close(struct input_stream *is)
+{
+	struct zzip_input_stream *zis = (struct zzip_input_stream *)is;
+
+	zzip_file_close(zis->file);
+	zzip_archive_close(&zis->archive->base);
+	input_stream_deinit(&zis->base);
+	g_free(zis);
+}
+
+static size_t
+zzip_input_read(struct input_stream *is, void *ptr, size_t size,
+		GError **error_r)
+{
+	struct zzip_input_stream *zis = (struct zzip_input_stream *)is;
+	int ret;
+
+	ret = zzip_file_read(zis->file, ptr, size);
+	if (ret < 0) {
+		g_set_error(error_r, zzip_quark(), ret,
+			    "zzip_file_read() has failed");
+		return 0;
+	}
+
+	is->offset = zzip_tell(zis->file);
+
+	return ret;
+}
+
+static bool
+zzip_input_eof(struct input_stream *is)
+{
+	struct zzip_input_stream *zis = (struct zzip_input_stream *)is;
+
+	return (goffset)zzip_tell(zis->file) == is->size;
+}
+
+static bool
+zzip_input_seek(struct input_stream *is,
+		goffset offset, int whence, GError **error_r)
+{
+	struct zzip_input_stream *zis = (struct zzip_input_stream *)is;
+	zzip_off_t ofs = zzip_seek(zis->file, offset, whence);
+	if (ofs != -1) {
+		g_set_error(error_r, zzip_quark(), ofs,
+			    "zzip_seek() has failed");
+		is->offset = ofs;
+		return true;
+	}
+	return false;
+}
+
+/* exported structures */
+
+static const char *const zzip_archive_extensions[] = {
+	"zip",
+	NULL
+};
+
+const struct input_plugin zzip_input_plugin = {
+	nullptr,
+	nullptr,
+	nullptr,
+	nullptr,
+	zzip_input_close,
+	nullptr,
+	nullptr,
+	nullptr,
+	nullptr,
+	zzip_input_read,
+	zzip_input_eof,
+	zzip_input_seek,
+};
+
+const struct archive_plugin zzip_archive_plugin = {
+	"zzip",
+	nullptr,
+	nullptr,
+	zzip_archive_open,
+	zzip_archive_scan_reset,
+	zzip_archive_scan_next,
+	zzip_archive_open_stream,
+	zzip_archive_close,
+	zzip_archive_extensions,
+};